WESTFORD (CBS) – Police in Westford are looking to identify a woman who stole a workers’ tip jar from a Dunkin Donuts.

The woman walked up to the counter, which is inside the Gulf station at 179 Littleton Road, around 5:30 p.m. on Monday.

Police say she ordered and paid for an ice coffee before grabbing a large coffee mug filled with about $30.

Three workers witnessed the theft. They say the suspect had a band-aid in the crook of her arm, indicating she may have recently had blood drawn. Witnesses also believe she may have had a red hospital bracelet or allergy bracelet on her right wrist.